Mix sugar and eggs together with an electric mixer, and add ¼ – ½ cup of water on low speed.
Mix until the icing forms a ribbon when drizzled, and stays for 5 seconds. You may need to add more icing sugar.
Divide the icing into as many bowls as you need depending on how many colours you will be using.
Add food colouring to the individual bowls until you reach your desired colours.
(Icing B)
For the colours that you wish to use as base colours (the colours for the dresses/large areas), divide the colours into two bowls each, and into one of the two bowls, add a little bit of water to make the icing more runny.
Decorating
Make the dress/accessories first: With a piping bag filled with a narrow tip, trace the outline of the bunny’s dress/ribbon/hat with the desired colour (icing A), making sure to connect the beginning of the line to the end. Let this set until hard.
With icing B in the same colour, fill in the outline of what you drew. Let this set until it is hard.
When the base design is finished, decorate the bunny’s face and outfit with icing A in a different colour. You may use a more narrow icing tip if you are doing detailed patterns. Let set and enjoy!